"I've already given you more than enough hints to figure it out on your own. I'm not going to do your homework for you," Mortimer answers humorlessly. "I've got my own problems to worry about."

And he does take a long moment throughout Matthew's... 'speech' to continue adjustments on the Jaunt itself. A switch flipped here, an input entered there, and so on.

"In your universe, perhaps. But not in this one. This world needs its magic. That is all I can say."